connector set for M221M and TM3 - IO Spring This connector set is proposed as a spare part available for Modicon M221 Book logic controllers and Modicon TM3 I/O expansion modules. It is used to connect the inputs/outputs of Modicon M221 Book logic controllers and Modicon TM3 I/O expansion modules. It is composed of 8 removable connectors with spring terminals used to equip a Modicon M221 Book logic controller and the digital I/O of Modicon TM3 I/O expansion modules. This product is certified by CE, IACS E10, CSA, RCM, LR, ABS, DNV-GL, EAC and CULus. It meets EN/IEC 61010-2-201, EN/IEC 61131-2 and EN/IEC 60664-1 standards.